Who knew that the devil actually had a plan before inhabiting the body of Sister Mary Eunice?

Unless that plan included slashing the throats of patients and investigators, and trying to seduce Dr. Arden, it seemed like the spirit was just winging it.

In reality, every move she's made so far has been calculated. The demon wants to run Briarcliff. Last week, her actions led to Sister Jude packing her bags. This week, she exercised her control over Dr. Arden.

After Grace is found bleeding, with her girl parts "scooped out," Sister Mary Eunice blames Arden for the failed sterilization attempt. Always up for a chance to argue using gaudy vocabulary, Arden retaliates.

"I performed no sterilization, Sister," Arden insists. "I demand to be spoken to with at least a modicum of respect."

No stranger to hitting women (or degrading them), Arden slaps Mary Eunice across the face. At least he managed not to call her a whore, so there's that for a sign of progress.

"You touch me again ... you will die," says the demon.

The slap-happy Arden goes in for another thrust to prove his dominance. It proves to be the wrong move as Mary Eunice sends Arden flying across the room.

"I hope that quantifies the chain of command, Arthur," she says.

Touched by an angel

After a patient named Miles tries to kill himself by sawing his arms off, he calls for the Angel of Death to take him away.

The angel, played by Frances Conroy (older Moira in season one), does just that and draws the attention of Sister Mary Eunice.

Mary Eunice confronts the angel and tells her to leave. The possessed nun must not like people stealing her kills. Somebody tell her this isn't "Call of Duty" and she's not earning points for each death.

The angel points out that Mary Eunice, that is the real Mary Eunice, wants to be killed and freed from the demon's grip.

"Now leave this place," says Mary Eunice. "You're not wanted here."

"The girl you've taken hostage sings to me," replies the angel.

"We have work left to do," says the possessed nun.

The angel promises her "dark cousin" the two entities will meet again.

Keeping a busy schedule, the angel next appears in Dr. Thredson's basement where Lana is being raped by the doctor.

As the angel appears, black wings unfolded and lips ready, Lana tells the angel she doesn't want to die just yet. Too bad Lana doesn't get to make that decision since she's being held captive by a serial killer.

"I want this to be as painless as possible," Thredson tells Lana. "I can either cut your throat or I can strangle you. I don't believe in guns."

Dr. Thredson tries to tie Lana down and go in for the kill, but she resists.

Lana smashes a picture over the doctor's head and really makes Thredson take on the meaning of his name -- Bloody Face.

Her escape is cut short however, as she jumps from one madman to another. Lana enters the car of the first person she sees and the driver happens to have issues with women, just like Thredson. The man's wife cheated on him with another man, and because Lana is also a woman, she too shall suffer.

The angel reappears as the man puts a gun to his throat, pulls the trigger, and blows his face apart, leaving Lana to endure the ensuing car accident. But hey, she gets to return to Briarcliff.

Lana may be wishing she granted her life to the Angel of Death, now. If not, she will be sorry when she becomes another Arden experiment or is "punished" by Sister Mary Eunice.

Sorry seems to be the hardest word

At the scene of Sam Goodman's homicide, Sister Jude gets a call from a familiar voice.

"It's your conscious calling," the voice says.

On the other end is Sister Mary Eunice and she's back at her manipulative ways, threatening to use her knowledge of Sister Jude's hit-and-run to her advantage.

Sister Jude doesn't go back to Briarcliff, but she does visit the family of the girl she struck with her car. The former nun tries to apologize, but the words don't seem to come out, even after discovering the girl survived the accident and is now an adult.

"We get to live with our daughter," says the girl's mother. "The monster who left her there, has to live with himself."

Sister Jude makes one last stop on her self-pity tour, this time to a local diner, where she almost slits her wrists in the bathroom (It's the most red we've seen in the show since Sister Jude was flailing around in her undergarments and "ravish-me-red" lipstick).

The Angel of Death comes swooping in and Sister Jude is left to explain herself.

"I'm just the girl who cried wolf," Sister Jude says as she laments on all the times she's considered ending her life.

Two waitresses at the diner observe, seeing only Sister Jude as she shakes her head.

"Poor thing," one waitress says. "Maybe we should call Briarcliff. At least they could give her a bed for the night."

One is the loneliest number

Wanting to escape so he can reunite with Grace, Kit assaults his public defender and returns to Briarcliff. He travels underground, through the death chute, and into the asylum.

Dr. Arden's creatures follow Kit, killing a nun, and drawing attention in the process. Frank the security guard, who has orders to shoot Kit on sight, comes into the room and pulls the trigger as Grace jumps in front of Kit.

"Take me," she tells the Angel of Death, as Kit looks on, alone and defeated.

Final thoughts:

Sister Jude must be the least qualified nun to ever wear the cloth. She's an alcoholic, promiscuous, former lounge singer who ran over a little girl, ran into a tree in the Briarcliff courtyard and runs from her problems in general. It's not surprising to find out she's contemplated suicide several times.

The Angel of Death must feel the same, as she tells Sister Jude that it's time for her to have some peace.

Briarcliff is becoming a cemetery. Shelley, Grace, Leo, Teresa, and the Hispanic patient have all died there (or suffered their life-threatening injuries there in Shelley's case). It's becoming a battle royale match -- last patient standing gets to live.

Lana told Sister Mary Eunice that Dr. Thredson is Bloody Face. Was Lana not paying attention to the odd behavior of the nun before she left the asylum? Not only does Sister Mary Eunice already know this fun fact, but she encouraged Thredson by telling him she admires his work.

What we learned:

There is one good bone in Dr. Arden's body. Usually acting as the Angel of Death himself, the doctor tries to save Grace's life after she's found bleeding and missing the aforementioned parts.

"I will not be the one to take the fall for this," he tells her. "You will live, Grace. If only to set the record straight."

Dr. Arden does save Grace, but a bullet from Frank the security guard nullifies his effort.